Camp cook stove



June 27, 1967 F, H, LESLlE 3,327,698

CAMP COOK sTovE v Filed oct. 21, 1965 United States Patent O 3,327,698CAMP COOK STOVE Freeland H. Leslie, 254 Exmoor Ave., Glen Ellyn, Ill.60137 Filed Oct. 21, 1965, Ser. No. 499,299 7 Claims. (Cl. 126-25)ABSTRACT F THE DISCLOSURE A charcoal-burning stove has a plurality ofindividual cooking units, each of which is demountable and all parts ofall units are nestable into a single compact bundle. Each burner unithas a draft intake opening on one side and may be rotated to face theopening into the wind to augment the draft and temporary chimneys areprovided to further increase dr-aft.

The present invention relates to an outdoor cooking stove having one ora number of burners employing charcoal as the fuel.

Under many circumstances it is desired to have an outdoor cooking stove,which may be provided with a number of burners, for the preparation ofthe various parts of a meal. Many such stoves are available in typesemploying highly arnmable gases and liquids. Under many circumstancespeople do not desire to use the ammable gases or liquids. For onethin-g, it doesnt seem as much like camping out as it does when wood orcharcoal is employed as the fuel. Furthermore, many people and groups donot wish to have such flammable uids around. For example, it isunderstood that those engaged in scouting do not believe that Boy Scoutsshould use any ammable fluids either for cooking or for the starting oflires. The danger to children who are less than careful is quiteobvious.

Three of the principal problems involved in the use of charcoal-burningstoves .are (1) speed and certainty of ignition and development of a hotre, (2) control of the heat during the cooking process, and (3) fueleconomy. The improvements in burner design and construction herein shownand described are directed particularly to these problems.

The principal object of the invention is to provide charcoal-burningapparatus for an outdoor cooking stove which apparatus makes possiblethe rapid ignition of the charcoal for the development of a hot lire ina short space of time with a minimum amount of kindling materials andcharcoal. Another object is to provide a charcoal burner which suppliesheat adequate for cooking purposes with a minimum amount of fuel. Afurther object is to provide such a burner With supplemental means forinducing draft during the ignition and lire development period; also,means for controlling the draft during the cooking period.

A further object is -the provision of an outdoor camp stove with aplurality of burners particularly suited for the burning of charcoalbriquettes. One feature of the invention is the compactness with whichthe stove may be 3,327,598 Patented .lune 27, 1967 have no opportunityto reach nearby flammable materials; and when the parts are nestedtogether for storage or transportation, those parts which are likely tobe blackened with soot Iand the like are not exposed to soil nearbyobjects or materials.

Additional objects and advantages will Ibecome apparent from thefollowing description taken in conjunction with the drawings in which:

FIG. 1 is a perspective view of a camp cook stove embodying the presentinvention;

FIG. 2 is an enlarged vertical section through one of the burners of thecook stove and a fragmentary adjacent portion of the supporting table;

FIG. 3 is a vertical section showing the burners nested together fortransportation or storage; land FIG. 4 is an exploded view illustratingthe manner in which the burners are nested together for storage.

Although the following disclosu-re offered for public dissemination isdetailed to ensure adequacy and aid understanding, this is not intendedto prejudice that purpose of a patent which is to cover each newinventive concept therein no matter how others may later disguise it byvariations in form or additions or further improvements. The claims atthe end hereof are intended as the chief aid toward this purpose; as itis these that meet the requirement of pointing out the parts,improvements, or combinations in which the inventive concepts are found.

FIG. 1 illustrates the over-all cook stove comprising a table designatedgenerally by the numeral 10, a small burner generally 20, a medium smallburner generally 30, a medium large burner generally 40, and a largeburner generally 50. Table 10 has a sheet metal top 11 with fouropenings therein, each of a size to receive one of burners 20, 30, 40and 50. Except for size, all of the openings correspond to opening 12which receives `burner 20 (FIG. 2). The table top 11 is supported at asuitable height by means of four legs 16 detachably held in four cornersockets 17. Alternatively, legs 16 may be foldable in the manner of aconventional card table. The term demountable is used herein to refer-to legs which can be detachably mounted in sockets as are legs 16 insockets 17 or are foldably connected to the table top in the manner of acard table.

Burner 20 will be described with respect to FIG. 2. It comprises acylindrical shell 21 which is mounted in opening 12 with its cylindricalaxis vertically oriented. An external bead 21a serves to support thecooking unit by resting on the top 11 of the table. An internal bead 21bserves as a support for a fire pan 22. In addition, beads 21a and 2lbadd substantial rigidity to the sheet metal shell 21. The bottom of theshell is closed by a base 23 forming a part of the shell. A draftopening 21C is provided in a side of shell 21 immediately above base 23.

Fire pan 22 is in the form of an inverted truncated cone. The base ofthe cone terminates with an outwardly extending flange 22a while the topof the truncated cone terminates with an inwardly extending flange 22b.Across the top and secured to flange 22b is a fire grate 24. Flange 22arestsfon internal bead 2lb to support the lire pan in shell 21. Restingon flange 22a is a cooking grate 25. Resting on grate 25 is a truncatedconical chimney 26 having a base flange 26a and an open top 26b.

Except for size of the vario-us components, the remaining burners 30, 40and 50 correspond in structure to that described for burner 20. Thus,burner 30 includes a shell 31 having a base 33, a lire pan 32, a firegrate 34, a cooking grate 35 and a chimney 36. Medium larger burner 40comprises a shell 41 with a base 43, a fire pan 42, a fire grate 44, acooking gxite 45 and a chimney 46. Large burner comprises a snell 51with a vbase 53, a fire pan 52, a fire grate 54, a cooking grate and achimney 3 56. In addition, the large burner 50 has a lid or cover 57.

To start a fire, some starting material is laid over re grate 24 andcharcoal briquettes 60 are deposited on the starting material. A verysatisfactory starting material is torn, waxed cardboard milk cartons,although paper and, if desired, a few splinters -of wood may be used.Grate 25 and chimney 26 are put in place as illustrated in FIG. 2. Onemay reach in through opening 21c and light the starting material throughgrate 24. Thus, the ignition flame is applied at the bottom of theburner for flaming upwardly through the fuel. The construction of theburner is such that the charcoal starts quickly and readily with only asmall amount of starting material. The bottom part of shell 21 forms adraft tube as does chimney 26, so that the chimney effective forinducing draft to accelerate development of the tire extends from thebottom of shell 21 to the top of temporary chimney 26. Air is drawnforcefully through opening 21e` and grate 24 to fan the fire. When thecharcoal 60 is well started, chimney 26 is removed and the burner thenis ready to be used for cooking purposes. The removal of chimney 26eliminates the forced starting draft so the charcoal may 'burn at anormal rate for cooking. Grilling may be performed directly on vcookinggrate 25 or suitably sized cooking pans may be supported on grate 25 toheat the contents of those pans.

In starting the fire, and if any wind is blowing, the forced draft maybe further augmented by turning opening 21e toward the direction fromwhich the prevailing wind is coming. When the lire has developed to anextent such that reduction of draft is desirable, the shells, e.g. 21,may be rotated in table top 11 so that openings, e.g. 21C, face awayfrom the direction from which the prevailing wind is coming.

One feature of the invention that contributes toward the obtaining ofmaximum usefulness from a small amount of charcoal is the manner inwhich the charcoal vis forced together by the shape of the fire pan. Thetruncated conical sides of re pan 22 cause the charcoal to slide towardthe center and thus keeps the re pushed together. To achieve sucheffect, it is necessary that the area of the base of the truncated cone(as represented by the internal opening defined by flange 22a) be from2.5 to 7.5 times as large as the area of the top of the truncated cone(where it meets flange 22b). Also, the height of the truncated coneshould be from 25% to 100% of the diameter of the top thereof. This isnot only important to the maintenance of the proper slope of the sidesbut also to obtain the proper spacing between a minimum re and thecooking grate 25.

FIGS. 3 and 4 illustrate how compactly the burners can be packed forstorage or transportation. First, the four shells 21, 31, 41 and 51 nesttogether. Within them is then received the four chimneys 26, 36, 46 and56. On top of the chimneys are packed the four re pans 22, 32, 42 and52, all nested together. Immediately under lid 57 are the four cookinggrates 25, 35, 45 and 55. Nested together in this way, the stove, withlegs demounted, may easily be carried in, for example, the trunk of acar.

I claim:

1. A charcoal-burning stove comprising a horizontal supporting panelhaving a circular opening therein, a cylindrical shell having an opentop and closed bottom extending through said opening, said shell beingprovided with a draft opening on one side only near the bottom thereof,an inverted truncated conical tire pan having a charcoal grate at thesmall end thereof arranged in said shell near the top thereof, and acooking grate in said shell above said tire pan, said shell having meansextending outwardly therefrom to rotatably support said shell in saidsupporting panel whereby said shell may be rol tated to orient saiddraft opening therein with respect to the wind at the location of saidstove.

2. A charcoal-burning stove comprising a horizontal supporting panelhaving a circular opening therein, a cylindrical shell having an opentop and closed bottom extending through said opening, said shell beingprovided with a draft opening near the bottom thereof, an invertedtruncated conical re pan having .a charcoal grate at the small endthereof arranged in said shell near the top thereof, a cooking grate insaid shell above said re pan, and a chimney demountably arranged at thetop of said shell to provide temporary increased draft during thestarting of the charcoal re.

3. A charcoal-burning stove comprising ia horizontal supporting panelhaving a circular opening therein, an exposed vertical cylindrical shellhaving an open top and closed bottom extending through said opening,said shell being provided with a draft opening on one side only near thebottom thereof, an inverted truncated conical tire pan having a charcoalgrate at the small end thereof arranged in said shell near the topthereof, a cooking grate in said shell above said fire pan, and achimney demountably arranged at the top of said shell to providetemporary increased draft during the starting of the charcoal fire, saidshell having means extending outwardly therefrom to rotatably supportsaid shell in said supporting panel whereby said shell may be rotated toorient said draft opening therein with respect to the wind at thelocation of said stove.

4. A system comprising a plurality of charcoal-burning cooking unitscapable of being individually disassembled and collectively nested forstorage in a single compact `bundle, each cooking unit comprising anelongated shell open`at its top end and closed at its bottom end buthaving a draft opening in the side thereof near the bottom end, aninverted truncated fire pan demountably 4supported within said shellnear the top thereof, a fire grate extending across the bottom of saidpan, and a cooking grate resting upon the top of said pan, saidY shells,lire pans, and grates of the plurality of cooking units respectivelybeing of similar shape and dilering in size sufficiently to permitnesting of the plurality of shells, nesting of the plurality of tirepans, and nesting of the nest of lire pans within the nest of shells toform the compact bundle.

5. A system in accordance with claim 4 wherein the shells arecylindrical and the re pans are conical.

6. A system in accordance with claim 4 wherein each shell is providedwith an external bead adapted to engage the periphery of a hole in ahorizontal panel for supporting said shell therein and an internal beadabove saidr elxtenal bead for supporting the lire pan within said s el7. A system in accordance with claim 4 wherein each cooking unit alsoincludes a truncated temporary chimney supported upon the fire pan, thechimneys of the plurality of cooking units being of similar shape anddiffering in size suiciently to permit nesting of the plurality ofchimneys and nesting of the nest of chimneys between lthe irilest ofshells and the nest of fire pans in the compact un e.

References Cited UNITED STATES PATENTS 155,390 9/1874 Schmidt 12S-25246,561 8/1881 Sassinot et al. 126-25 607,642 7/ 1898 Botelho 126-251,214,086 1/1917 Shaw 126-43 2,530,166 11/1950 Johannsen 126-253,091,170 5/1963 Wilson 126-25 X 3,276,440 10/ 1966 Sazegar 126-25FREDERICK KETTERER, Primary Examiner.

1. A CHARCOAL-BURNING STOVE COMPRISING A HORIZONTAL SUPPORTING PANELHAVING A CIRCULAR OPENING THEREIN, A CYLINDRICAL SHELL HAVING AN OPENTOP AND CLOSED BOTTOM EXTENDING THROUGH SAID OPENING, SAID SHELLPROVIDED WITH A DRAFT OPENING ON ONE SIDE ONLY NEAR THE BOTTOM THEREOF,AN INVERTED TRUNCATED CONICAL FIRE PAN HAVING A CHARCOAL GRATE AT THESMALL END THEREOF ARRANGED IN SAID SHELL NEAR THE TOP THEREOF, AND ACOOKING GRATE IN SAID SHELL ABOVE SAID FIRE PAN, SAID SHELL HAVING MEANSEXTENDING OUTWARDLY THEREFROM TO ROTATABLY SUPPORT SAID SHELL IN SAIDSUPPORTING PANEL WHEREBY SAID SHELL SAID MAY BE ROTATED TO ORIENT SAIDDRAFT OPENING THEREIN WITH RESPECT TO THE WIND AT THE LOCATION OF SAIDSTOVE.